Implement media Cast button in Blink

content/browser/media/android/browser_media_player_manager.cc

Index: content/browser/media/android/browser_media_player_manager.cc
diff --git a/content/browser/media/android/browser_media_player_manager.cc b/content/browser/media/android/browser_media_player_manager.cc
index 0eda452fa3f1556d769d04f39020224d4c5c201b..04d77a50a90498cb9f69a5afe937db8f7c22e7ad 100644
--- a/content/browser/media/android/browser_media_player_manager.cc
+++ b/content/browser/media/android/browser_media_player_manager.cc
@@ -517,6 +517,15 @@ void BrowserMediaPlayerManager::OnDestroyPlayer(int player_id) {
     fullscreen_player_id_ = -1;
 }
 
+void BrowserMediaPlayerManager::OnRequestRemotePlayback(int /* player_id */) {
+  // Does nothing if we don't have a remote player
+}
+
+void BrowserMediaPlayerManager::OnRequestRemotePlaybackControl(
+    int /* player_id */) {
+  // Does nothing if we don't have a remote player
+}
+
 void BrowserMediaPlayerManager::AddPlayer(MediaPlayerAndroid* player) {
   DCHECK(!GetPlayer(player->player_id()));
   players_.push_back(player);